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Finding the Fourth Proportional to 3,869.44, 5,804.12 and 947.72

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Solution

The fourth proportional to 3,869.44, 5,804.12 and 947.72 is: 1,421.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,869.44 : 5,804.12 = 947.72 : x
  2. Step 2: Convert to fraction form
    3,869.44/5,804.12 = 947.72/x
  3. Step 3: Cross multiply
    3,869.44x = 5,804.12 × 947.72
  4. Step 4: Simplify right side
    3,869.44x = 5,500,680.61
  5. Step 5: Solve for x
    x = 5,500,680.61/3,869.44
  6. Step 6: Final answer
    x = 1,421.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.